ppt on different adhesives and their types and compositions.

1. RECENT REVIEW ON PLANT BASED
ADHESIVES
By: Divya Garg
Sanya Gulati
Dr. Roli Pulwar
INTERNATIONAL
CONFERENCE
ON
“CHEMICAL & ALLIED
SCIENCE AND THEIR
APPLICATIONS”

2. CONTENT
 Introduction
 Benefits of biobased adhesives
 Natural sources of biobased adhesives
 Lignin
 Tannin
 Soy Protein
 Conclusion
 References

3. INTRODUCTION
Significant
role of
adhesives
Wood Industry
Synthetic adhesives
• Formaldehyde emission
• Toxic for humans and
environment
E.g. Urea formaldehyde,
phenol formaldehyde
Problems
Solution
Natural based
adhesives

4. BENEFITS OF
BIOBASED
ADHESIVES
 Their large range of types
 Outstanding durability
 Good performance
 Average resistance to heat and/or moisture
 Reduce carbon footprint
 Inherent biodegradability of renewable materials is often higher
 Reduce human and environmental toxicity

5. NATURAL SOURCES
OF BIOBASED
ADHESIVES
LIGNIN
SOY PROTEIN
TANNIN

6. LIGNIN
Three-dimentional
Amorphous polymer
Holds plant fibres together
Used as foundation for formaldehyde free resin
Same characteristic as
formaldehyde based resin
Water tolerance Fast curing
Comparable
adhesion
performance
Formation of ether
bonds between lignin
hydroxyl group and
the glycerol derived
crosslinker epoxide

7. TANNIN
Naturally water-soluble
polyphenols.
PROPERTIES
Crosslinking behavior
with phenol and
formaldehyde
Reduce
formadehyde
emmision
Unique features like,
• Antioxidant
• Anticarcinogenic
• Antimicrobial
• Anti-inflamatory
SOURCES OFTANNIN

8. SOY PROTEIN
Epoxidation
Fig1. Epoxidation of Soyabean oil molecule for formation of epoxy-
linkage
Enhancement
in
performance
of Adhesives Chemical denaturation
Enzymatic modification
Crosslinking and inclusion
of additives

9. CONCLUSION
Replacement of
petroleum based
adhesives
Incorporation of
Bio-polymers
Synthesis of new bio-
based adhesives
Alternative to traditional petroleum based product having great potential to
enter new application and experience future growth

10. REFERENCES
 Esmaeili N, Zohuriaan-Mehr MJ, Salimi A, Vafayan M, Meyer W. Tannic acid
derived non-isocyanate polyurethane networks: Synthesis, curing kinetics,
antioxidizing activity and cell viability. Thermochimica Acta. 2018 Jun 10;664:64-
72.
 Aristri MA, Lubis MA, Yadav SM, Antov P, Papadopoulos AN, Pizzi A, Fatriasari W,
Ismayati M, Iswanto AH. Recent developments in lignin-and tannin-based non-
isocyanate polyurethane resins for wood adhesives—A review. Applied Sciences.
2021 Jan;11(9):4242.
 Van Langenberg K, Grigsby W, Ryan G. Green adhesives: options for the
Australian industry—summary of recent research into green adhesives from
renewable materials and identification of those that are closest to commercial
uptake. For. Wood Prod. Aust. Proj. Number PNB158-0910, FWPA. 2010 Jun.
 Khosravi S, Nordqvist P, Khabbaz F, Johansson M. Protein-based adhesives for
particleboards—effect of application process. Industrial Crops and Products.
2011 Nov 1;34(3):1509-15.
 Ferdosian F, Pan Z, Gao G, Zhao B. Bio-based adhesives and evaluation for wood
composites application. Polymers. 2017 Feb 17;9(2):70.
 Antov P, Savov V, Neykov N. Sustainable bio-based adhesives for eco-friendly
wood composites. A review. Wood Res. 2020 Jan 1;65(1):51-62.